Servlet BMI 실습

Quiz

 

//키를 m 단위로 변환 제곱한 뒤 몸무게 에서 나눠준다.   //BMI = 몸무게 / 키^2   // < 18.5 : 낮음, 18.5 ~ 22.9 : 정상체중, >= 23.0 과체중,   // 23.0 ~ 24.9 : 위험체중, 25.0 ~ 29.9 : 비만 1단계,   // > 30 : 비만 2단계 , >= 40.0 : 비만 3단계   //몸무게 : <input type="text" name="weight" /> <br/>   //키 : <input type="text" name="height" /> <br/>   // ~~ 님은 비만 1단계 입니다. 식으로 출력

 

web.xml 

 

<!-- BMI 지수 구하기 (체중, 키) -->  <servlet>   <servlet-name>bmi</servlet-name>   <servlet-class>bmi.BmiServlet</servlet-class>  </servlet>    <servlet-mapping>   <servlet-name>bmi</servlet-name>   <url-pattern>/bmi.kh</url-pattern>  </servlet-mapping>

 

BmiServlet.java 

 

package bmi;   import java.io.*; import javax.servlet.*; import javax.servlet.http.*;   public class BmiServlet extends HttpServlet {  @Override  protected void doPost(HttpServletRequest request,       HttpServletResponse response)    throws ServletException, IOException {   String result = null;   request.setCharacterEncoding("euc-kr");   String name = request.getParameter("name");   String weight = request.getParameter("weight");   String height = request.getParameter("height");      double height1 = Double.parseDouble(height);   double weight1 = Double.parseDouble(weight);      double bmi = Math.round((weight1 / ((height1 / 100) * (height1 / 100))));      if(bmi < 18.5){    result = "저체중";   }else if(bmi >= 18.5 && bmi <= 22.9){    result = "정상체중";   }else if(bmi >=23.0 && bmi <= 24.9){    result = "과체중";   }else if(bmi >= 25.0 && bmi <= 29.9){    result = "비만 1단계";   }else if(bmi >= 30.0 && bmi <= 40.0){    result = "비만 2단계";   }else if(bmi > 40.0){    result = "비만 3단계";   }   response.setCharacterEncoding("euc-kr");   PrintWriter out = response.getWriter();   out.write("<H2>"+name+"</H2>"+"님은"+"<h2>"+result+"</h2>"+"이삼"+bmi);  } }

 

index.jsp

 

<form action ="/pp/bmi.kh" method="post">  이름 : <input type="text" name="name" /> <br/>  몸무게 : <input type="text" name="weight" /> <br/>  키 : <input type="text" name="height" /> <br/>  <input type="submit" value="전송"/> </form>